The benefits of scraping your tongue have to do with the fact that your tongue collects a lot of bacteria and dead cells. The bad breath that you experience may be due to the bacteria located on your tongue.
A tongue scraper can effectively remove bacteria and dead cells from the muscle. You can use a scraper like a copper scraper or a stainless steel scraper to effectively remove bad bacteria that might make you ill.
All you need to do to use it is to run the scraper from the back of your tongue to the front.